A case for hardened seats....

Max Power

Active Member
Jul 31, 2003
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St Paul
Building a 393 for my 69 Fastback and while taking apart the 351w that is in there, I was pretty surprised how badly recessed the exhaust valves in three cylinders had become. One of the valves is the thickness of a 50 cent piece into the head. Hopefully you will be able to tell from the picture.

Remember, if you are using old heads, put hardened seats on the exhaust side.
 

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